attwood 9300FDV7 Universal Fuel Demand Valve for 3/8-Inch and 5/16-Inch Fuel Hoses High-strength composite material stands up to the Harshest marine environments Low vacuum restriction ensures proper engine functioning at start-up and during Operation Versatile; Compatible with 3/8 inch and 5/16 inch fuel hoses and ethanol blended fuels Compatible with all original equipment Manufacturer (OEM) brands Attwood develops high value, engineered marine products to make life on the water easier to enjoy Prevents engine flooding and fuel spillage due to pressurized fuel Allows only the amount of fuel requested by the engine and prevents a pressurized slug of fuel from reaching the engine Compatible with 3/8 and 5/16 fuel hose Installs between the fuel tank and the primer bulb 20 psi maximum nominal input pressure-protected for 40 psi pressure spike